:root {
  --white: #ffffff;
  --off-white: #f3f0ff;
  --surface: #e8e0ff;
  --ink: #0f0e0c;
  --ink-2: #3a3835;
  --ink-3: #6b655f;
  --violet: #4c1d95;
  --violet-mid: #6d28d9;
  --violet-lt: #ddd6fe;
  --amber: #b45309;
  --amber-lt: #fde68a;
  --teal: #0f766e;
  --teal-lt: #99f6e4;
  --red: #b91c1c;
  --red-lt: #fee2e2;
  --border: rgba(15, 14, 12, 0.12);
  --shadow-sm: 0 1px 2px rgba(15, 14, 12, 0.08);
  --shadow-md: 0 3px 8px rgba(15, 14, 12, 0.1);
  --shadow-lg: 0 6px 14px rgba(15, 14, 12, 0.12);
  --shadow-xl: 0 8px 18px rgba(91, 33, 182, 0.14);
  --font-display: 'Clash Display', 'Plus Jakarta Sans', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --rain-1: rgba(109, 40, 217, 0.28);
  --rain-2: rgba(13, 148, 136, 0.24);
  --rain-3: rgba(217, 119, 6, 0.2);
  --rain-4: rgba(220, 38, 38, 0.18);
}

[data-theme="dark"] {
  --white: #161825;
  --off-white: #0b0d14; 
  --surface: #141620;  
  --ink: #e4e6ed;      
  --ink-2: #9ca3af;    
  --ink-3: #6b7280;    
  
  --violet: #c4b5fd;
  --violet-mid: #8b5cf6; 
  --violet-lt: rgba(139, 92, 246, 0.15); 
  
  --amber: #fbbf24;
  --amber-lt: rgba(245, 158, 11, 0.15);
  
  --teal: #38bdf8;       
  --teal-lt: rgba(14, 165, 233, 0.15);
  
  --red: #f87171;
  --red-lt: rgba(239, 68, 68, 0.15);
  
  --border: rgba(255, 255, 255, 0.08); 
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 10px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 10px 22px rgba(139, 92, 246, 0.12);
  
  --rain-1: rgba(139, 92, 246, 0.18);
  --rain-2: rgba(56, 189, 248, 0.15);
  --rain-3: rgba(251, 191, 36, 0.12);
  --rain-4: rgba(248, 113, 113, 0.12);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--off-white);
  background-image: radial-gradient(circle at 20% 0%, var(--rain-1), transparent 34rem),
                    radial-gradient(circle at 90% 12%, var(--rain-2), transparent 28rem),
                    radial-gradient(circle at 10% 95%, var(--rain-3), transparent 30rem);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.rainbow-bg {
  position: fixed;
  inset: 0;
  z-index: -10;
  pointer-events: none;
  background-image: radial-gradient(circle at 45% 35%, var(--rain-1), transparent 32rem),
                    radial-gradient(circle at 80% 25%, var(--rain-2), transparent 30rem),
                    radial-gradient(circle at 20% 85%, var(--rain-4), transparent 26rem);
  opacity: 0.9;
}

button {
  cursor: pointer;
  font-family: var(--font-body);
  border: none;
  background: none;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

a {
  text-decoration: none;
  color: inherit;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 10;
}

.view {
  display: none;
  opacity: 0;
  animation: fadeUpView 0.28s var(--ease-smooth) forwards;
  padding-top: 120px;
  padding-bottom: 60px;
  min-height: 100vh;
}

.view.active {
  display: block;
}

@keyframes fadeUpView {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.nav {
  position: fixed;
  top: 15px;
  left: 50%;
  transform: translateX(-50%);
  width: 95%;
  max-width: 1160px;
  z-index: 2000;
  padding: 0.6rem 1.5rem;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(15, 14, 12, 0.08);
  border-radius: 99px;
  box-shadow: var(--shadow-md);
}

[data-theme="dark"] .nav {
  background: rgba(16, 18, 27, 0.94);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-md);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--ink);
}

.nav__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--violet-mid), #9333ea);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .9rem;
  color: #fff;
  font-family: var(--font-display);
  font-weight: 800;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
}

.nav__btn {
  font-size: .875rem;
  font-weight: 600;
  color: var(--ink-3);
  padding: 0.5rem 1.25rem;
  border-radius: 99px;
  border: 1px solid transparent;
  transition: color 0.18s var(--ease-smooth), background-color 0.18s var(--ease-smooth), border-color 0.18s var(--ease-smooth);
}

.nav__btn:hover {
  color: var(--violet-mid);
  background: rgba(124, 58, 237, 0.09);
}

.nav__btn.active-tab {
  color: var(--violet-mid);
  background: var(--violet-lt);
  border: 1px solid rgba(124, 58, 237, 0.28);
}

.nav__right {
  display: flex;
  align-items: center;
  gap: .75rem;
}

.nav__btn-ghost {
  padding: .6rem 1.2rem;
  border-radius: 8px;
  font-size: .875rem;
  font-weight: 600;
  color: var(--ink-2);
  border: 1.5px solid var(--border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  background: var(--white);
  box-shadow: var(--shadow-sm);
  z-index: 50;
  transition: color 0.18s var(--ease-smooth), background-color 0.18s var(--ease-smooth), border-color 0.18s var(--ease-smooth);
}

.nav__btn-ghost:hover {
  border-color: var(--violet-mid);
  background: var(--violet-lt);
  color: var(--violet-mid);
}

.nav__btn-primary {
  padding: .6rem 1.25rem;
  border-radius: 8px;
  font-size: .875rem;
  font-weight: 700;
  background: var(--ink);
  color: var(--white);
  box-shadow: var(--shadow-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  z-index: 50;
  transition: background-color 0.18s var(--ease-smooth);
}

.nav__btn-primary:hover {
  background: var(--violet-mid);
}

.theme-toggle {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 50px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--ink);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  z-index: 50;
  transition: background-color 0.18s var(--ease-smooth);
}

.theme-toggle:hover {
  background: var(--surface);
}

.theme-toggle .icon-sun, .theme-toggle .icon-moon {
  position: absolute;
  transition: transform 0.24s var(--ease-smooth), opacity 0.24s var(--ease-smooth);
}

:root .theme-toggle .icon-sun { transform: translateY(0); opacity: 1; }
:root .theme-toggle .icon-moon { transform: translateY(30px); opacity: 0; }

[data-theme="dark"] .theme-toggle .icon-sun { transform: translateY(-30px); opacity: 0; }
[data-theme="dark"] .theme-toggle .icon-moon { transform: translateY(0); opacity: 1; }

.wallet-pill {
  background: var(--amber-lt);
  border: 1px solid rgba(217, 119, 6, 0.4);
  color: var(--amber);
  padding: 6px 14px;
  border-radius: 99px;
  font-size: 13px;
  font-weight: 700;
  box-shadow: var(--shadow-sm);
  z-index: 50;
}

.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem 2rem;
  text-align: center;
  z-index: 10;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: var(--violet-lt);
  border: 1px solid rgba(124, 58, 237, .28);
  color: var(--violet-mid);
  padding: .35rem .9rem;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero__headline {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.04em;
  color: var(--ink);
  margin-bottom: 1.5rem;
}

.hero__headline em {
  font-style: normal;
  background: linear-gradient(135deg, var(--violet-mid) 0%, #9333ea 50%, var(--amber) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__sub {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--ink-3);
  font-weight: 500;
  max-width: 560px;
  margin: 0 auto 2.5rem;
}

.fcard {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  z-index: 50;
  transition: box-shadow 0.18s var(--ease-smooth), border-color 0.18s var(--ease-smooth);
}

.fcard:hover {
  box-shadow: var(--shadow-md);
}

.fcard::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, rgba(124, 58, 237, 0), transparent);
  transition: background 0.18s var(--ease-smooth);
}

.fcard:hover::before {
  background: linear-gradient(90deg, var(--violet-mid), #9333ea, var(--amber));
}

.fcard__icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 1.25rem;
  font-weight: 700;
}

.fcard__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: .55rem;
}

.fcard__desc {
  font-size: .95rem;
  color: var(--ink-3);
  font-weight: 500;
}

.vault-row {
  display: flex;
  align-items: center;
  gap: .75rem;
  background: var(--surface);
  border-radius: 12px;
  padding: 1.2rem;
  border: 1px solid var(--border);
  margin-bottom: 12px;
  z-index: 50;
  position: relative;
  transition: border-color 0.18s var(--ease-smooth), background-color 0.18s var(--ease-smooth);
}

.vault-row:hover {
  border-color: var(--violet-mid);
}

.section__eyebrow {
  display: inline-block;
  font-size: .75rem;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--violet-mid);
  margin-bottom: .75rem;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--ink);
  margin-bottom: 1rem;
}

.section__sub {
  font-size: 1rem;
  color: var(--ink-3);
  font-weight: 500;
  max-width: 520px;
  margin-bottom: 2rem;
}

.subjects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.footer {
  background: var(--surface);
  padding: 3rem 1.5rem;
  text-align: center;
  border-top: 1px solid var(--border);
  margin-top: 40px;
  position: relative;
  z-index: 10;
}

.footer__links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-top: 15px;
  flex-wrap: wrap;
}

.footer__links button {
  font-size: .85rem;
  font-weight: 600;
  color: var(--ink-3);
  transition: color 0.18s var(--ease-smooth);
}

.footer__links button:hover {
  color: var(--violet-mid);
}

.data-module {
  color: var(--ink-3);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 25px;
}

@media (max-width: 768px) {
  body {
    padding-bottom: calc(148px + env(safe-area-inset-bottom));
    background-image: linear-gradient(135deg, rgba(109, 40, 217, 0.12), transparent 46%),
                      linear-gradient(315deg, rgba(13, 148, 136, 0.1), transparent 52%);
  }

  [data-theme="dark"] body {
    background-image: linear-gradient(135deg, rgba(139, 92, 246, 0.08), transparent 46%),
                      linear-gradient(315deg, rgba(56, 189, 248, 0.05), transparent 52%);
  }

  .rainbow-bg { display: none; }
  
  .nav {
    top: auto;
    bottom: calc(12px + env(safe-area-inset-bottom));
    left: 50%;
    transform: translateX(-50%);
    width: min(96vw, 520px);
    max-width: calc(100vw - 20px);
    padding: 0.5rem;
    border-radius: 20px;
    z-index: 3000;
  }
  
  .nav__logo-text { display: inline; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  
  .nav__logo { display: flex; min-width: 0; gap: 0.4rem; font-size: 0.9rem; grid-column: 1; grid-row: 1; overflow: hidden; }
  
  .nav__logo-mark { width: 28px; height: 28px; min-width: 28px; border-radius: 7px; font-size: 0.75rem; }
  
  .nav__inner { display: grid; grid-template-columns: minmax(0, 1fr) auto; grid-template-rows: auto auto; align-items: center; gap: 0.45rem; }
  
  .nav__links { display: flex !important; position: static; inset: auto; transform: none; width: 100%; min-width: 0; flex: none; grid-column: 1 / -1; grid-row: 2; max-width: none; background: transparent; border: 0; border-radius: 0; padding: 0; justify-content: space-between; gap: 0.25rem; box-shadow: none; z-index: auto; }
  
  .nav__links li { min-width: 0; flex: 1 1 0; }
  
  [data-theme="dark"] .nav__links { background: transparent; border: 0; box-shadow: none; }
  
  .nav__btn { min-width: 0; flex: 1 1 0; display: flex; align-items: center; justify-content: center; width: 100%; padding: 0.62rem 0.35rem; font-size: 0.72rem; line-height: 1; text-align: center; white-space: nowrap; }
  
  .nav__right { display: flex; flex: 0 0 auto; grid-column: 2; grid-row: 1; gap: 0.25rem; margin-left: 0; min-width: 0; }
  
  .nav__right .nav__btn-ghost, .nav__right .nav__btn-primary, .nav__right .wallet-pill { display: inline-flex; }
  
  .nav__btn-ghost, .nav__btn-primary { min-height: 32px; padding: 0.38rem 0.55rem; border-radius: 999px; font-size: 0.68rem; white-space: nowrap; }
  
  .wallet-pill { display: inline-flex; align-items: center; min-height: 32px; padding: 0.35rem 0.5rem; font-size: 0.68rem; max-width: 78px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  
  .theme-toggle { width: 32px; height: 32px; min-width: 32px; font-size: 0.92rem; }
  
  .view { padding-top: 40px; padding-bottom: 165px; }
  
  .fcard { padding: 1.5rem; }
  
  .fcard, .nav, .nav__btn-ghost, .nav__btn-primary, .theme-toggle, .wallet-pill { box-shadow: none; }
}

@media (max-width: 390px) {
  .nav { width: calc(100vw - 12px); max-width: calc(100vw - 12px); padding: 0.42rem; }
  .nav__logo { font-size: 0.78rem; }
  .nav__logo-mark { display: none; }
  .nav__btn { font-size: 0.66rem; padding-inline: 0.22rem; }
  .wallet-pill { max-width: 64px; }
  .nav__btn-ghost, .nav__btn-primary { padding-inline: 0.42rem; font-size: 0.64rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}